Distance/Proximity Sensor for IoT

In IoT projects, we frequently need to measure the distance from the sensor to an object. An example is the Keyestudio SR01 Ultrasonic Sensor Distance Measuring Module

The Keyestudio SR01 Ultrasonic Sensor Distance Measuring Module is a sensor module designed for computer boards such as Arduino and Raspberry Pi. The module uses a 5V DC power supply with a working current of 15 mA and a working frequency of 40 Hz. The sensor has a "seeing angle" of 15 degrees. Its miximum detecting range is 5 meters, minimum range is 2cm. The size of the module is 49mm x 22mm.

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